How to Initialize a Discrete-Time Model?
조회 수: 3 (최근 30일)
이전 댓글 표시
Hello,
I have the following discrete-time model.
num = [0.02884 -0.02844];
den = [1 -1.7298 0.7337];
H = tf(num,den,0.005);
opt = stepDataOptions('StepAmplitude',200,'InputOffset',250);
figure;
step(H, opt);
Is it possible to set the initial conditions of this transfer function? I would like to initialize the model output (rather than 0) without changing how the input looks like (i.e using InputOffset option in the stepDataOptions for the step()).
Daniel
댓글 수: 0
답변 (1개)
Farouk Moukaddem
2016년 8월 26일
Hi Daniel,
Theoretically speaking, Transfer Functions are defined when all initial conditions on a system are set to zero.
However, if initial conditions need to be changed, it has to be realized in state space (by using integrator in continuous time and unit delays in discrete time).
To specify initial conditions, convert your system to state-space model using the "tf2ss" command and use the State-space block in Simulink.
For more information on this, refer to the following documentation link:
Best,
Farouk
댓글 수: 0
참고 항목
카테고리
Help Center 및 File Exchange에서 Additional Math and Discrete에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!